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https://github.com/FFmpeg/FFmpeg.git
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ac627b3d38
* commit '716d413c13981da15323c7a3821860536eefdbbb': Replace PIX_FMT_* -> AV_PIX_FMT_*, PixelFormat -> AVPixelFormat Conflicts: doc/examples/muxing.c ffmpeg.h ffmpeg_filter.c ffmpeg_opt.c ffplay.c ffprobe.c libavcodec/8bps.c libavcodec/aasc.c libavcodec/aura.c libavcodec/avcodec.h libavcodec/avs.c libavcodec/bfi.c libavcodec/bmp.c libavcodec/bmpenc.c libavcodec/c93.c libavcodec/cscd.c libavcodec/cyuv.c libavcodec/dpx.c libavcodec/dpxenc.c libavcodec/eatgv.c libavcodec/escape124.c libavcodec/ffv1.c libavcodec/flashsv.c libavcodec/fraps.c libavcodec/h264.c libavcodec/huffyuv.c libavcodec/iff.c libavcodec/imgconvert.c libavcodec/indeo3.c libavcodec/kmvc.c libavcodec/libopenjpegdec.c libavcodec/libopenjpegenc.c libavcodec/libx264.c libavcodec/ljpegenc.c libavcodec/mjpegdec.c libavcodec/mjpegenc.c libavcodec/motionpixels.c libavcodec/mpeg12.c libavcodec/mpeg12enc.c libavcodec/mpeg4videodec.c libavcodec/mpegvideo_enc.c libavcodec/pamenc.c libavcodec/pcxenc.c libavcodec/pgssubdec.c libavcodec/pngdec.c libavcodec/pngenc.c libavcodec/pnm.c libavcodec/pnmdec.c libavcodec/pnmenc.c libavcodec/ptx.c libavcodec/qdrw.c libavcodec/qpeg.c libavcodec/qtrleenc.c libavcodec/raw.c libavcodec/rawdec.c libavcodec/rl2.c libavcodec/sgidec.c libavcodec/sgienc.c libavcodec/snowdec.c libavcodec/snowenc.c libavcodec/sunrast.c libavcodec/targa.c libavcodec/targaenc.c libavcodec/tiff.c libavcodec/tiffenc.c libavcodec/tmv.c libavcodec/truemotion2.c libavcodec/utils.c libavcodec/vb.c libavcodec/vp3.c libavcodec/wnv1.c libavcodec/xl.c libavcodec/xwddec.c libavcodec/xwdenc.c libavcodec/yop.c libavdevice/v4l2.c libavdevice/x11grab.c libavfilter/avfilter.c libavfilter/avfilter.h libavfilter/buffersrc.c libavfilter/drawutils.c libavfilter/formats.c libavfilter/src_movie.c libavfilter/vf_ass.c libavfilter/vf_drawtext.c libavfilter/vf_fade.c libavfilter/vf_format.c libavfilter/vf_hflip.c libavfilter/vf_lut.c libavfilter/vf_overlay.c libavfilter/vf_pad.c libavfilter/vf_scale.c libavfilter/vf_transpose.c libavfilter/vf_yadif.c libavfilter/video.c libavfilter/vsrc_testsrc.c libavformat/movenc.c libavformat/mxf.h libavformat/utils.c libavformat/yuv4mpeg.c libavutil/imgutils.c libavutil/pixdesc.c libswscale/input.c libswscale/output.c libswscale/swscale_internal.h libswscale/swscale_unscaled.c libswscale/utils.c libswscale/x86/swscale_template.c libswscale/x86/yuv2rgb.c libswscale/x86/yuv2rgb_template.c libswscale/yuv2rgb.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
139 lines
4.2 KiB
C
139 lines
4.2 KiB
C
/*
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* RTP JPEG-compressed video Packetizer, RFC 2435
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* Copyright (c) 2012 Samuel Pitoiset
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavcodec/bytestream.h"
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#include "libavcodec/mjpeg.h"
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#include "libavutil/intreadwrite.h"
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#include "rtpenc.h"
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void ff_rtp_send_jpeg(AVFormatContext *s1, const uint8_t *buf, int size)
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{
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RTPMuxContext *s = s1->priv_data;
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const uint8_t *qtables = NULL;
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int nb_qtables = 0;
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uint8_t type = 1; /* default pixel format is AV_PIX_FMT_YUVJ420P */
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uint8_t w, h;
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uint8_t *p;
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int off = 0; /* fragment offset of the current JPEG frame */
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int len;
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int i;
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s->buf_ptr = s->buf;
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s->timestamp = s->cur_timestamp;
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/* convert video pixel dimensions from pixels to blocks */
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w = s1->streams[0]->codec->width >> 3;
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h = s1->streams[0]->codec->height >> 3;
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/* check if pixel format is not the normal 420 case */
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if (s1->streams[0]->codec->pix_fmt == AV_PIX_FMT_YUVJ422P) {
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type = 0;
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} else if (s1->streams[0]->codec->pix_fmt == AV_PIX_FMT_YUVJ420P) {
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type = 1;
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} else {
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av_log(s1, AV_LOG_ERROR, "Unsupported pixel format\n");
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return;
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}
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/* preparse the header for getting some infos */
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for (i = 0; i < size; i++) {
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if (buf[i] != 0xff)
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continue;
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if (buf[i + 1] == DQT) {
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if (buf[i + 4])
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av_log(s1, AV_LOG_WARNING,
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"Only 8-bit precision is supported.\n");
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/* a quantization table is 64 bytes long */
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nb_qtables = AV_RB16(&buf[i + 2]) / 65;
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if (i + 4 + nb_qtables * 65 > size) {
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av_log(s1, AV_LOG_ERROR, "Too short JPEG header. Aborted!\n");
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return;
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}
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qtables = &buf[i + 4];
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} else if (buf[i + 1] == SOF0) {
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if (buf[i + 14] != 17 || buf[i + 17] != 17) {
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av_log(s1, AV_LOG_ERROR,
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"Only 1x1 chroma blocks are supported. Aborted!\n");
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return;
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}
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} else if (buf[i + 1] == SOS) {
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/* SOS is last marker in the header */
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i += AV_RB16(&buf[i + 2]) + 2;
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break;
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}
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}
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/* skip JPEG header */
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buf += i;
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size -= i;
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for (i = size - 2; i >= 0; i--) {
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if (buf[i] == 0xff && buf[i + 1] == EOI) {
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/* Remove the EOI marker */
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size = i;
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break;
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}
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}
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p = s->buf_ptr;
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while (size > 0) {
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int hdr_size = 8;
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if (off == 0 && nb_qtables)
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hdr_size += 4 + 64 * nb_qtables;
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/* payload max in one packet */
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len = FFMIN(size, s->max_payload_size - hdr_size);
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/* set main header */
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bytestream_put_byte(&p, 0);
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bytestream_put_be24(&p, off);
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bytestream_put_byte(&p, type);
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bytestream_put_byte(&p, 255);
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bytestream_put_byte(&p, w);
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bytestream_put_byte(&p, h);
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if (off == 0 && nb_qtables) {
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/* set quantization tables header */
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bytestream_put_byte(&p, 0);
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bytestream_put_byte(&p, 0);
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bytestream_put_be16(&p, 64 * nb_qtables);
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for (i = 0; i < nb_qtables; i++)
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bytestream_put_buffer(&p, &qtables[65 * i + 1], 64);
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}
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/* copy payload data */
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memcpy(p, buf, len);
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/* marker bit is last packet in frame */
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ff_rtp_send_data(s1, s->buf, len + hdr_size, size == len);
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buf += len;
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size -= len;
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off += len;
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p = s->buf;
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}
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}
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